Mammillaria microcarpa f. gueldemanniana (Backeb.) Neutel. in Succulenta (Netherlands) 65: 4. 1986
Mammillaria microcarpa f. gueldemanniana in Succulenta (Netherlands) 65: 4. 1986
is new combination for Mammillaria gueldemanniana in Kakteenkunde 1941: 57. 1941